I have been playing this game with my friends. Very very fun. It really puts me into the zone and keeps me there for a really long time.
That said, there are some things that are confusing. Mostly the progression system for me. I don't understand how resources get added to the tree and when playing with friends, it seems the host has to unlock everything or the progression won't be shared. At least that is how it worked for us.
That is just a minor issue though because we just play and when I can unlock stuff, I just do. Fun game, and worth a try.
The game is great, but has very serious problems:
1) The user interface has no Tooltips. This is fatal for the game flow during the first 50 hours.
For example:
a) the game just displays small icons for resources. You know that you need e.g. Titanium. Guess which icon it is - it's one out of about 20.
b) you would like to produce the "Dagger" unit. I hope you know it's icon (1 out of 20), because if you select the unit for production, the game does not display its name.
c) you know which unit you would like to produce. Unfortunately, the game does not tell you which resources must be delivered to the factory so that it can start producing this unit.
d) You're searching for the factory which is able to generate Silicon? This is a long, long way: Click the 1st factory. Click the '?' button. Read the factory-description. Click the 'x' to close the help dialogue. Repeat this many, many times until you've fount it.
All those very annoying issues could be easily fixed with useful tooltips (as all other games do). But because the game does not display those most basic information, you always have to stop the game flow, switch to google and try to find answers.
But: the game ist great... I'll test it again in early 2022.